For Loops

[ArcticClaws]

Hello! Recently, I have been trying to create a for loop. I understand how basic for loops work, but seem to be stuck on this one; most tutorials cover duplicating movie clips, but I'm interested in seeing how it would be written for a different statement. Here is the code that I want to be made into a for loop:

onEnterFrame = function() {
		boxV1._x++;
		boxV2._x++;
		boxV3._x++;
		boxV4._x++;
}

The above code currently works for what I am doing and the four movie clips do move across the stage, but I would like to write it as a for loop. Here is the current for loop that I am using:

onEnterFrame = function() {
	for (i=0;i<101;i++){
		"boxV"+i._x++;
	}
}

As you can see, I'm quite confused on the statement of the for loop. I feel like I am close, but have written it wrong somehow. Also, it doesn't matter at this point how many are specified to move (I only need four, but in the loop I specified 100). Any help would be appreciated!